Jesus sucks

backend/frontend/node_modules/@csstools/sass-import-resolve/index.mjs

@@ -0,0 +1,134 @@
+import { readFile, stat } from 'fs';
+import { basename, dirname, join } from 'path';
+
+/* Resolve the absolute path of a file in Sass
+/* ========================================================================== */
+
+export default function resolve(id, rawopts) {
+	const opts = Object.assign({
+		cache: {},
+		cwd: process.cwd(),
+		readFile: false
+	}, rawopts);
+
+	// if `id` starts with `/`
+	if (starts_with_root(id)) {
+		// `cwd` is the filesystem root
+		opts.cwd = '';
+	}
+
+	// `file` is `cwd/id`
+	const file = join(opts.cwd, id);
+
+	// `base` is the last segment path of `file`
+	const base = basename(file);
+
+	// `dir` is all but the last segment path of `file`
+	const dir = dirname(file);
+
+	const tests = [];
+
+	// if `base` ends with `.sass`, `.scss`, or `.css`
+	if (ends_with_sass_extension(base) || ends_with_css_extension(base)) {
+		// test whether `file` exists
+		tests.push(test_file(file, opts));
+
+		// if `base` does not start with `_`
+		if (!starts_with_partial(base)) {
+			// test whether `dir/_base` exists
+			tests.push(test_file(join(dir, `_${base}`), opts));
+		}
+	} else {
+		// otherwise
+		tests.push(
+			// test whether `dir/base.scss` exists
+			test_file(join(dir, `${base}.scss`), opts),
+			// test whether `dir/base.sass` exists
+			test_file(join(dir, `${base}.sass`), opts),
+			// test whether `dir/base.css` exists
+			test_file(join(dir, `${base}.css`), opts)
+		);
+
+		// if `base` does not start with `_`
+		if (!starts_with_partial(base)) {
+			tests.push(
+				// test whether `dir/_base.scss` exists
+				test_file(join(dir, `_${base}.scss`), opts),
+				// test whether `dir/_base.sass` exists
+				test_file(join(dir, `_${base}.sass`), opts),
+				// test whether `dir/_base.css` exists
+				test_file(join(dir, `_${base}.css`), opts)
+			);
+		}
+	}
+
+	return Promise.all(tests).then(
+		test => test.filter(result => result)
+	).then(files => {
+		// if the length of existing files is `1`
+		if (files.length === 1) {
+			// return the existing file
+			return files[0];
+		}
+
+		// otherwise, if the length of existing files is greater than `1`
+		if (files.length > 1) {
+			// throw `"It's not clear which file to import"`
+			throw new Error('It\'s not clear which file to import');
+		}
+
+		// otherwise, if `base` does not end with `.css`
+		if (!ends_with_css_extension(base)) {
+			// throw `"File to import not found or unreadable"`
+			throw new Error('File to import not found or unreadable');
+		}
+	});
+}
+
+/* Additional tooling
+/* ========================================================================== */
+
+function test_file(file, opts) {
+	opts.cache[file] = opts.cache[file] || new Promise(resolvePromise => {
+		if (opts.readFile) {
+			readFile(file, 'utf8', (error, contents) => {
+				if (error) {
+					resolvePromise(false);
+				} else {
+					resolvePromise({
+						file,
+						contents
+					});
+				}
+			});
+		} else {
+			stat(file, (error, stats) => {
+				if (error || !stats.isFile()) {
+					resolvePromise(false);
+				} else {
+					resolvePromise({
+						file
+					});
+				}
+			});
+		}
+	});
+
+	return opts.cache[file];
+}
+
+function starts_with_root(id) {
+	return /^\//.test(id);
+}
+
+function starts_with_partial(base) {
+	return /^_/.test(base);
+}
+
+function ends_with_css_extension(base) {
+	return /\.css$/i.test(base);
+}
+
+function ends_with_sass_extension(base) {
+	return /\.s[ac]ss$/i.test(base);
+}